In family law matters, the past behavior and practices of the parties will always be examined whenever change is sought. Michigan law in this area is well established and courts are continually bombarded with parents asking for modifications to child custody or parenting time arrangements. One common mistake that many parents make, is that they assume past indiscretions or old issues can be brought up when seeking modification of prior orders. When asking the court to change an existing custody and/or parenting time arrangement, a court will only consider occurrences in the time period after the last court order was made.